Chase and form cooler



June 23, 1953 H. E. GREENBURG EI'AL 2,642,725

CHASE AND FORM COOLER 7 Filed Feb. 18, 1952 2 Sheets-Sheet 1 I B l L a 75 l5 52" I H m 22 in (9 v 9 mmvrok. Herman E. Greenbuz q' By and Oscar.H. Olson.

June 23, 1953 H. E. GREENBURG ETAL 2,642,725

' CHASE AND FORM (2001.23

Filed Feb. 18, 1952 2 Sheets-Sheet 2 DATUM PLANE DATUM PLAN 1 andINVENTORS Herman .ELGreenbugr By and Oscar II. Olson Patented June 23,1953 UNITED STATES PATENT OFFICE Herman E. Greenhurg,Portia-1111..v and.0mm Olson, Garden Home, Orez. I

Application. February 18, 195%, Serial-.Nfl. (C!- 62-41 9v Claims. 1,

Our invention. pertains to the handling and cooling of a chase and its.contents, a. chase being: an articulated rectangular steel. frame withinwhich a page of type and/or plates and cutsare locked either forprinting directly or for making a mat or matrix, and the. inventionbeing. expressed both as a method andas. amechanism-..

Over the course: of the. past twenty-five: years, the art ofstereotypeprinting in color rapidlyhas advanced both as concerns the speed and.the quality of the: printing and as concerns the ex-- cellenceof detailinthe execution thereof. These forward strides today are evident in themulti colored comic and magazine sections: of large newspapers, in, the:excellent detail obtained in multi-colored advertising broadsides andother literature, and in the colored pictures and aid-- vertising ofmagazines. In a broad sense, the instant invention is directed toward animprovement: in and in a further step. forward. in; the art ofstereotype printing'incolor.

To provide a setting for and to appreciate:- the, advantages andimprovements accomplished by the instant invention, a typical"stereotype make up and. processing operation will be: examined. In a,large metropolitan newspaper; by way" of example, a multi-color magazineor term. and. home section often accompanies the Sunday edition of the:paper. Let it be assumed. that aparticular double page of. one such:section is to be printed in three colors on ahigh speed; rotary press.Firstly, the lead type plates and/or. partial cuts are assembled in asteel chase which rests upon a smooth topped worh table,.the: en.-

tire assembly often weighing 160: to 20.0: pounds and being almostimpossible to: lift by the edges without losing a small space slug orline of type. After make up, the chase very carefully is moved. by cartto a so-called "direct pressure machine for the practice, well known to:those skilled? in. the stereotype printing art, of the hot process. Inbrief; this process is practiced with a direct pressure machine having alarge h rdraulic pressure platen capable of exerting'a verticalcompressive force of" from 600130 900 tons. The pressure platen, inturn, is equipped with: electric heater, of twenty kilowatt or'l'argensize, capable of heating the-platen to acontrolledtemperature-of'from250't'o30U 'R Continuing with thepreparation of: the. rotary: press stereotypes, the made up: chase ispositioned in: the pressure machine and a dry mat; having a cellulosefiberbase is: laid over the top; of the chase. The platen thendescends.upon themat to heatand press the latter against. the 18GB; of

. 2 I the type and cuts: with a. compressive force of about 600. or70.0- tons. seven to fiiteen. minutes under this presume and heat, themat hascured: and baked. sufliciently to? have impressed. thereon a.reverse copy of. the contents of the chase. Theflnishedmat then. is.removed from the pressure machine: and. hot. lead ispouredi thereover tocast a cylindrical stereotype-1oz the rotary press. In. the meantime;the chase. with care and finesse. is removed. from the pressure machine.and, conventionally, is left. to coolto' mat: then are repeated to forma. second. stereotype when three such stereotypes. have been cast. theyare positioned serially on three adiacenteylinders. ot. a,- high speed.rotary press and. eachis. inkedwithuadifierenucolor.

when. a. sheet. newsprint. is fed: past three cylindrical stereotypm, itis printedainthreesuc cessive colors one on top or or complementary tothe other, to formv a. complete nm-lti-color sheet, two tabloidsizepages conventionally being printed: at the same. timev That particularportionot. thewabove described: process: with; which the instantinvention most directly: is concerned. involves. the: treatment of the:chase between: the time one mat is formed. and. the time the nextlayout'is. made: up: Thus, each time the hot molding process: is practiced.whereby a dry mat ismcessedl baked; and-cured: in the? direct pressuremachine; the temperature at the: anditscontentaare elevatedato thetemperature or. platen. (approximately 300 F3); Needless to relate. thisindirect heatingof: the steel. chase and its: lead. contentsisundesinable and: is provocative.- of several. However,. it cannot beavoided. since a; true dry mat; impression; reqinres the application oi.both; heat and; pressure: by,- theplaten. One undesir able feature of.the increase in temperature isthat the type; plates; and. cuts expand:much more thamthc steel chase lead a. 006i!- ficient of. expansion.approximately three times: asgreat as that. for. steel. Further, thisdiffer-en? tial expansion. problem amplified by the. fact that thealignment of. the cuts and/or plates within; the chase must.- bemaintained true and. exact in. successive makes ups the 06mm are tomatch with a. sharp. demarcation and detail. on the. printed page;Still. further, the meltingpoint; of; the leadparts within. the; chaseis-some what lesa-thanfiilo E and, under thesix-to: nine Accordingly,one object of our invention is to provide a refrigeration device forcooling a chase, said device to be capable of handling the chaseexpeditiously and carefully so that none of the type will be losttherefrom due to contraction during the cooling process and so thevarious lead elements (the type and plates) will not be displaced ordisturbed during handling both before and after cooling.

Another object of our invention is to provide a novel method oftreatment for cooling'a chase from a temperature of approximately 300 F;to a temperature of 70 F. in the shortest possible time and withoutdisturbing the delicate and. critical alignment of the elements withinthe chase, to the ultimate end that the type and cuts thereafter may bemanipulated with the bare hands and may be interchanged preparatory topressing another mat therefrom.

In satisfaction of the above objectives, our invention provides aninsulated hollow cabinet having a cooling compartment therein withrefrigeration means for circulating refrigerated air about thecompartment. Additionally, a heat conductive slab of metalextendslaterally across the cooling compartment and is provided with asmooth plane top surface. The rear margin of this slab is mounted uponpivot means lying within a fixed horizontal datum plane, the definitionof such a plane being important to the careful handling of a chaseActuation means, operable from without the cabinet cooperate with thedatum plane pivot means to articulate the slab as an entity between alower position in which the plane top surfacethereof is below the datumplane and a raised position in which the top surface is above the datumplane, the total movement between these positions being substantiallyless than one-quarter inch. Ac-

cordingly, when a heated chase of type is brought to the cabinet forcooling, it is transported the fixed horizontal datum plane abovedefined. Thereafter, the 'slab is pivoted to the lower position so as tolie approximately one-eighth of an inch below the datum plane and thechase, together with its lead contents, is slid from the datum planeonto the slab. The refrigeration mechanism then is actuated to cool thechase uniformly and quickly as hereinafter will be described. The slabthen is pivoted to the raised position so the front margin'of the topsurface thereof will lie approximately one-eighth inch above the datumplane. From this raised position, the chase once more can be slid out ofthe cabinet and into the fixed horizontal datum plane without disturbingthe alignment of the contracted lead type and plates. Further incontrast with the conventional practice by which the chase was left atroom temperature for about three hours during the cooling process, ournovel refrigeration device will cool the "entire chase at a uniform rateand progressively from both surfaces thereof in approximately fourminutes. In labor cost alone, this speed-up effects a considerablesaving since the assembly of a complete three color stereotype canprogress no faster than the cooling of the chase.

In accord with the method definition of our invention, a uniform coolingof the chase is effected progressively toward the center of the type andplates from both faces thereof. method includes the steps of providing aheat conductive slab having a substantially horizontal smooth planesurface, positioning the heated chase upon a horizontal datum planeimmediately adjacent but just above the plane surface of the slab,sliding the chase from the datum plane onto the said plane surface,blowing refrigerated air over the exposed surfaces of both the chase andthe slab until the temperature of the former is reduced sufficiently toallow Ina-- nipulation thereof with the bare hands, raising a portion ofthis slab vertically until the plane surface thereof is substantiallycoextensive with but slightly above the horizontal datum plane, andsliding the cooled chase off of the plane surface and onto the datumplane for further processing and use.

In summary, our refrigeration mechanism and the practice of ourinventive method provide a faster, more uniform, and less expensive cooling of the chase. Further, the precise and deliberate handling of thechase during and after cooling assure a minimal disturbance of thecritical positioning of the type and plates within the chase so thatexcellent detail on the printed page is assured.

The above and other inventive objects, capabilities and advantagesinherent in and encompassed by our invention will become apparent fromthe ensuing description, taken in conjunction with the accompanyingdrawings, wherein:

Fig. 1 is a perspective view of the refrigeration device of ourinvention showing a chase in the process of being admitted thereto;

Fig. 2 is a sectional front to rear view looking through the coolingcompartment of our refrig eration device substantially as indicated bythe arrows 2-2 in Fig. 3 and showing a chase in the process of beingcooled, the direction of movement of the circulating refrigerated airabout the heat conductive slab and the top of the chase being indicatedby small arrows;

Fig. 3 is a sectional side view of our invention, with the relativepositions of the heat conductive slab and the chase exaggeratedsomewhat, better to illustrate the manner in which the chase is movedinto the cooling compartment without disturbing the type and plates; and

Fig. 4 is a partial detail view similar to Fig. 3 in the amount ofexaggeration but illustrating the raised position of the heat conductiveslab whereby the chase may be removed from the cooling chamber withoutdisturbing its contents.

Our refrigeration device particularly is designed for the treatment of asteel chase, such as is shown at 5. To this end, the articulated partsof the refrigerator must be capable of precise and exact adjustment soas not to disturb the type and the plates carried within the chase.Thus, when completely made up preparatory to having a mat formulti-color stereotype printing pressed therefrom, a chase is the sizeof a full newspaper page and it weighs to 200 pounds or more. Further,as well known in the printing art, a chase should not be lifted by theedges or a line of type or a small space slug will fall out.Accordingly, it is handle with great 5 care and": is; moved about: in:the stereotype dee partmenti on large-2 carts or: wagons: 6 having;smooth fiat tops 1": thereon. In: sequence; the chase will be madeupi ona smooth. table: top;

will be. slid on of. the table and onto the:- flat? top. 1 of the cart6, will. be slid; from. this top: I tov the flat worlri area of adirect. pressure; machine; will be. remove'd'f'rom thepressure machineto a similar cart 6 and; thereafter, \villbe'; ad. mitted to therefrigeration device' o'f. our; invention, each such movement: beingeffected: with care by butting two. substantially parallell flat-isurfaces together and" sliding. the" chase: from; one surface of theother.

In detail, our refrigerator has cabinet: 8.: which stands. upon. fourlegs 9. Each; of theselegs, in turn; carries a leveling screw Ill.which: defines one portion of a variable level: means: Thus; thecabinet: is supported adjustably in order that the. various elements.ofthe refrigerator may be leveled with" respect. to. a horizontal; datumplane. as hereinafter will be described;

Progressing. now' to the structural" details of the cabinet 8, aplurality of insulatedwallsine cluding' a front wall. l I, a back Wall.[2-, and side walls it, are arrangedto bound a coolingchamher It.Additionally, alaterally elongated. rec'- tangular opening 15 piercesthe. front wall. H to provide access to the. cooling chamber Mfromwithout' the. cabinet. In cooperation therewith, an insulated doorit. is mounted pivotally: upon the front wall selectively to closeorv toexpose the opening 15. Duringthe cooling process, of. course, the dooris closed to inhibit the entrance of. heat. into the. cooling chamber.

Withinthe cooling chamber M. Wev mount a large heat conductive slab ofmetahsuch as aluminum, I? and, in. accord with the. previouslymentioned. leveling screws :0; this slab is disposed in a substantiallyhorizontal plane: The. top of the slab; as shown in the drawings, ismachined to a smooth plane surface and; the bottom. thereof. asindicated at it in Fig. 2; is corrugated or finned to enhance thethermoconductivity of the slab and to intercept.v air blown thereacross.Further, as acompa-risonof: Figs. and S willreveal, the. slab llextendscom.- pletely across. the cooling compartment from front to back but itterminates short of the: sidewalls l3. Accordingly, a circulation ductor open space I9 is defined intermediate the side mar-- gins of the slabll and the side. walls l3 fo'r: a. purpose hereinafter to be described.

At this point, .an important feature of my: in.- vention will becomeevident.. Thus, the rear margin of the slab I? is mounted upon ahinge2t! and the front portion thereof is carried upon two eccentric earns21-. The cams 21', in turn; are lreyed to a transverse shaft 22" whichis jour-- nalecl in the opposite side walls l3 of the cabinet and whichprotrudes beyond one sideoft'he cabinets to terminate in a crank arm 23.When the crank arm 23 is rotated, the eccentric cams I! serve to pivotthe slab: l-"labout the hinge-2t".

In cooperation with these last described el'e-- ments, I have shown adatum plane" in Figs. 3 and 4. Thisdatum plane is horizontal and'- thesmooth flat top I of the cart G lies exactly within the datum plane, thevarious elements of" the refrigerator cabinet being correlated totheposition of the datum plane by adjusting the leveling screws it; Forexample, the hinge 2H for the slab H preferably is correlated withrespectto and is parallel'to'the'dat'um plane. The eccentric cams 2!, inturn, are correl'ated'tc the position is. pivotabl'e. backand forththrough intercepting.

ment l4.

s as by' a: plurality of thin walls 25.

6 offthe. slabsmthe': smooth top surfaceof. the latter relationship withthe datum plane. In this manner, the camsdefine: an actuation: meansoperable; to pivot the slab I 1. between a lower position in. which. theplane top. surface. thereof is below the datumpla-ne: (seeFig. 3 and araised position in which the top surface is above the datum plane: (seeFig. 4)-.

tween these positions is bisected by the fixed datum plane and: theoverall vertical movement of: thefront edge: of the slab isapproximately of an inch or, in any event, is less than onea half inch..

Turning now to Figs. 2' and 3, the cooling chamber I4 is" provided withrefrigeration means for circulating: refrigerated air about the slab ITand. through the compartment. This refrigeraztion. means: takes the formof a conventional compressor motormechanism 24- having the usualrefrigerant lines 2.5 joined thereto; At the top of the cooling: chamberH, on the other hand, a rectangulartunneli may be defined: and boundedWithin this tunnel, the; refrigerantlines 25- areformed into evaporatorcooling; coils 21. Further, a motor driven: fan: 28 is' aligned-with thecoils.- 21 and is directed laterally across" the cooling compart- When;operated, this fan blows; and circulates. air across thecoils 2-! andaround the interior of; the cabinet. A; portion ofv this refrigerated.air: circulates. down. one of the ducts l9 and. up-v tlie other duct. L9as shown by the arrows in Fig. 2. In result, this portion of therefrigerated air: co'acts. with. the corrugations [8 on the: bottom. ofthe. slab. to. cool the: slab, and, thereby,. to cool the chose 5 fromthe bottom up. A second portion. of. the; refrigeratedair, asv indicatedby further arrows inll'ig. 2,v is blown across the top of:v thechase-51:0:v cool the latter from the upper: surface down. Thus;thechase-S-is cooled I at a substantially uniform rate. inwardly fromboth. surfaces thereof, the. circulation of the refrigeratedair; the:conductivity of the metal slab H1, and the fins. or. corrugationscarried by the sl'alr all cooperating to produce this desired uni=-formity.v

In order: totretrievethe chase 5 from the inte- 1101':- of thecabinet,.we: provide an elongated book 29. having a handle an on. oneend thereof and a perpendicular plate-31 onthe" other end thereof. Thishook. is guided: in. an appropriate bracket carried. by theifront wall.II or". the cabinet and movable a: direction. substantially parallel tothe. top ofithe slab H to retrieve the chase 5. If desired, theinsulated door I6 may have a cutaway portion. 32. therein withinv whichthe handle: 3.8: tests when. thedoor is" closed. The facts that-thechase 5.- is' massive and that the opening I51 provides. only limitedaccess to the cooling; chamber of the: cabinet require the use of: ahoohofthisetype;

The operation of: my' refrigerationdevice will be described: with.respect to: that portion of a color. stereotype? process which. takesplace between: thehot. mold formation of a dry mat. and the changing ofthetype and/or theplates-witln in. the.- chase. 'l hus',v when the"chase 5 leaves the pressure: machine (previously described), it: hasz'azuniform elevated temperature of. between" 250:andi 300: Accordingly itismoved. onto the: smooth top I: off the cart. 8' with: an appropriate'push rod or it handled: with gloves; In either event} the chase must behandled". with.

Genericall-y, the angle i traced by the-pilvotalmovement of the slabbecare so the alignment of the type and plates will not be disturbed.After loading, the cart is wheeled to the cabinet 8 where it ispositioned in abutment with the end of the slab ll, the leveling screwsit] previously having been adjusted to match with the cart. Thereafter,the slab I1 is lowered to the position of Fig. 3 so as to lie slightlybelow the datum plane in which the top of the cart lies. Thisdisposition of the slab, of course, is effected by manipulating thecrank arm 23 to turn the eccentric cams 2| and, thereby, to pivot theslab about the hinge 23 which lies parallel to and substantially withinthe datum plane.

When correctly positioned, the chase 5 is pushed and is slid off of theflat top I and onto the smooth surface of the slab I! as indicated bythe movement arrow in Fig. 3. Once the heated chase is in place upon theslab, the door it is closed and the chase is cooled by circulatingrefrigerated air thereover as shown in Fig. 2. This refrigerationprocess, in practice, will lower the temperature of the chase from about300 F. to about room temperature (or 70 F.) in four minutes or less whenthe refrigeration mechanism is operating emciently. Further, the chaseis cooled uniformly both from the bottom and from the top due to thenovel divided circulation of the cooled air and to the fin orcorrugation elements on the bottom of the heat conductive slab il. Ifsuch uniformity were not maintained, the lead might become misaligneddue to the different rates of contraction of the steel and lead andbecause of a differential contraction within the lead parts per se.

After the steel chase and the lead contents thereof have been cooledsufficiently, the door I5 is swun open and latched, as indicated at 33,and the crank arm 23 is manipulated. This manipulation of the crank armraises the slab il pivoi-ally by rotation of the eccentric cams 2!. Inthe raised position( see Fig. 4), the top surface of the slab II liesslightly above the datum plane so the chase may be transferred from theslab to the cart without disturbing the type and the plates. Thistransfer is effected by pulling on the handle 30 so the plate 3| of the11001; contacts the back of the chase. After transfer, of course, thechase once more is ready for processing and for use in forming a secondor a third mat from which a different stereotype color plate will becast. In practice, the precise disposition of the slab relative to thedatum plane has proven very effective and, even with a minimum of careand patience, the chase can be transferred to and from the refrigeratorwithout disturbing the type and plates.

Defining our invention as a method, we first set forth a combinationwhich includes a chase having a page of type and plates fastenedtherein, said chase and the contents thereof having a substantiallyuniform elevated temperature exceeding 200 F. The method then becomesone for treating and for cooling the chase and contents withoutdisturbing the critical alignment of the type and plates and to the endthat the various elements thereafter may be manipulated with the barehands. The first step of the method is to provide a pivotally mountedheat conductive slab ll having a. substantially horizontal smooth planetop surface. This horizontal arrangement of the slab surface is effectedwith the leveling screws l0. Additionally, the heated chase ispositioned and rested upon a horizontal datum plane immediately adjacentbut just above the plane surface of the slab as shown in Fig. 3.Thereafter, the method progresses as the chase is slid from the datumplane onto the plane surface and refrigerated air is blown over theexposed surfaces of both the chase and the slab until the temperature ofthe'former is reduced sufficiently to allow manipulation thereof withthe bare hands. Prior to removing the chase, the slab is pivotedupwardly until the plane top thereof is raised slightly above the datumplane. The total vertical movement of the front margin of the slabbetween these two positions is less than one-half inch and the angletraced by the pivotal movement is bisected by the datum plane. Finally,the method is concluded when the cooled chase is slid from the planesurface onto the datum plane for further processing and use.

In summary, I have provided both a mechanism and a method for cooling achase without disturbing the critical and delicate arrangement of thecontents thereof. Further, the chase can be cooled in a minimal time sothat the mat forming equipment will not be tied up and so the othersteps of the process for forming stereotype color plates can proceedsubstantially immediately and without delay. In actual practice, thisinvention has resulted in substantial savings in processing color workon a large metropolitan newspaper and, additionally, the detail of thiscolor work has been improved materially.

We claim:

1. A refrigeration device for cooling a chase. comprising an insulatedhollow cabinet having a cooling compartment therein, refrigeration meansmounted within said compartment for circulating refrigerated airthereabout, said cabinet having an opening through one wall thereofproviding access to the cooling compartment, a substantially horizontalheat conductive slab extending laterally across said cooling compartmentand terminating within the bounds of said opening, said slab having asmooth plane top surface and an irregular bottom surface, pivot meanslying parallel and closely adjacent to a fixed horizontal datum planeand joined to that margin of the top surface of the slab which is remotefrom said opening to mount the slab for pivotal movement about the saidmargin. and actuation means for pivoting said slab between a lowerposition in which said plane top surface is below said datum plane and araised position in which the top surface is above the datum plane, theangle traced by the pivotal movement of said slab between said positionsbein bisected by said fixed datum plane.

2. A refrigeration device for cooling a chase which initially is at atemperature exceeding room temperature, comprising an insulated hollowcabinet having a cooling compartment there-- in, refrigeration meansincluding a coil and a fan mounted within said compartment to circulaterefrigerated air thereabout, a heat conductive slab of metal extendinglaterally across said cooling compartment, said slab having a smoothplane top surface, pivot means lying substantially within a fixedhorizontal datum plane and joined to one margin of the slab to mount theslab for pivotal movement about the said margin, actuation meansoperable to pivot said slab between a lower position in which said planetop surface is below said datum plane and a raised position in which thetop surface is above the datum plane, the angle traced by the pivotalmovement of said slab between said positions being bisected by said:fixed datum plane, and wax-liablev l'evel :me'ans supporting saidcabinet I adlustably Tito position compartment from front .to'backterminating short of the side walls 'thereGftodefin'e'tWb 's'ifdecirculation ducts intermediate the side ,m'ar'gins of the-slab and theside walls, actuation-means bearing upon said slab selectively'forpivoting'the slab about said pivotal mounting, referigeration meansmounted within said cooling compartment to cool the air within thecompartment, and fan means aligned with said coil and directed laterallyacross said compartment to blow cooled air through said side circulationducts and across said slab.

4. A refrigerator for cooling a chase, comprising a cabinet havinginsulated front, back and side walls bounding a cooling compartment, asubstantially horizontal heat conductive slab of metal mounted pivotallyupon said back wall within said cooling compartment, said slab having asmooth plane top surface, the pivotal mounting for said slab lyingclosely adjacent and parallel to a horizontal datum plane and the smoothtop surface of the slab being movable with the slab back and forththrough intersecting relationship with said datum plane, actuation meansbearing upon said slab selectively for pivoting the front of the slababout said back wall pivotal mounting, and refrigeration'means withinsaid cooling compartment for cooling the same.

5. A refrigerator for cooling a chase and the l tially horizontal heatconductive slab mounted pivotally within said cooling compartment, saidslab extending completely across said cooling compartment from front toback, actuation means bearing upon said slab selectively for pivotingthe front of the slab about said pivotal mounting, said actuation meansincluding a lift element joined operatively to a crank which is mountedwithout the cabinet, and refrigeration means within said coolingcompartment for circulating refrigerated air about said slab and throughthe compartment.

6. A refrigerator for cooling a chase, comprising a cabinet havinginsulated front, back and side walls bounding a cooling compartment, asubstantially horizontal heat conductive slab mounted pivotally withinsaid cooling compartment, said slab extending completely acrosssaidcooling compartment from front to back butterminating short of the sidewalls thereof to define two side circulation ducts intermediate the sidemargins of the slab and the side walls, said slab having a smooth planetop surface, the pivotal mounting for said slab lying parallel to ahorizontal datum plane and the smooth top surface of the slab beingmovable with the slab back and 10 foiththrcughzintersecting relationship.with said datum :plane, :a'ctuation: means :bearing :iuponrsaid slabselectively, for mivotihg:theifro'ntv of ztheslab about ;saidipivotalimountin'g, an elongated hook means .:extending-. through.;zsaid opening :and .sinonnted .-fci' retraction; across thecoolingcomxpartmentigt retrieuerobje'cts. restingonthe said top:surfac'erof ithe slab, :a ;rfrigerated;coil:means mmunt'ed withinsaidicmbling compartment :above said slab; tozicool' the air withinthecorhpartm'ent, andifan means aligned withsaidcoilzanddirected.:laterally :across said ocompartmentito .blow;icooled :air throughwsaidrside'jcirr-v ulation ducts andacr'oss maid-slab l :7. :A.refrigerator for :cooling a chase end the contents thereof after theyhave become heated during use, comprising a polygonal cabinet havin aplurality of insulated walls including front, back and side wallsbounding a cooling compartment, said front wall having a laterallyelongated rectangular opening therethrough to provide access to thecooling compartment from without the cabinet, an insulated door meansmounted pivotally upon said front wall selectively to close or to exposesaid elongated opening, a substantially horizontal heat conductive slabof metal mounted pivotally within said cooling compartment, level meanssupporting said cabinet to adjust the horizontal disposition of saidslab within limits, said slab terminating substantially flush with saidelongated opening and having a smooth plane top surface and a corrugatedbottom surface, actuation means bearing upon said slab selectively forpivoting the front of the slab about said pivotal mounting, saidactuation means including a lift element joined operatively to a crankwhich terminates without the cabinet, an elongated hook means extendingthrough said opening and mounted for retraction across the coolingcompartment in a direction substantially parallel the top surface ofsaid slab to retrieve objects resting on the said top surface, andrefrigeration means within said cooling compartment for circulatingrefrigerated air about said slab and through the compartment.

8. A method for treating a chase and its contents after they have becomeheated to an elevated temperature during use, saidmethod including thesteps of providing a heat conductive slab having a substantiallyhorizontal smooth plane surface, positioning the heated chase upon ahorizontal datum plane immediately adjacent but just above the planesurface of said slab, sliding said chase from said datum plane onto saidplane surface, blowing refrigerated air over the exposed surfaces ofboth the chase and the slab until the temperature of the former isreduced sufficiently to allow manipulation thereof with the bare hands,raising a portion of said slab vertically until the plane surfacethereof is substantially coextensive with but slightly above saidhorizontal datum plane, and sliding the cooled chase off of said planesurface and onto said datum plane for further processing and use.

9. In combination with a chase having a page of type and plates fastenedtherein, said chase and the contents thereof having a substantiallyuniform elevated temperature exceeding 200 F., a method for treating andcooling the same without disturbing the critical alignment of thecontents within the chase and to the end that the various elementsthereafter may be manipulated with the bare hands, said method includingthe steps of providing a pivotally mounted heat conductive slab having asubstantially horizontal smooth plane surface, positioning and restingthe heated chase upon a horizontal datum plane immediately adjacent butjust above the plane surface of said slab, sliding said chase from saiddatum plane onto said plane surface, blowing refrigerated air over theexposed surfaces of both the chase and the slab until the temperature ofthe former is reduced sufiiciently to allow manipulation thereof withthe bare hands, pivoting said slab about the pivotal mounting thereforuntil that margin of the plane surface which is immediately adjacent thehorizontal datum plane is raised slightly above the datum plane, thetotal movement of the margin of the plane surface being less thanone-half inch and the angle traced 15 12 by the pivotal movement of theslab being bisected by said datum plane, and sliding the cooled chaseoff of said plane surface and onto said datum plane for furtherprocessing and use.

HERMAN E. GREENBURG. OSCAR H. OLSON.

References Cited in the file of this patent UNITED STATES PATENTS 10Number Name Date 2,163,062 Riesenkonig June 20, 1939 2,196,080Reynoldson Apr. 2, 1940 2,218,417 Bush Oct. 15, 1940 2,275,588 GreeneMar. 10, 1942

